Google Books Ngram Viewer

Graph these comma-separated phrases:
case-insensitive
between and from the corpus with smoothing of .  
Search in Google Books:

1850 - 1919 1920 - 1937 1938 - 1942 1943 - 1992 1993 - 2008 bitter notwendig German
1850 - 1920 1921 - 1983 1984 - 1991 1992 - 1998 1999 - 2008 bitter nötig German

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